Hey guys, I just found an app caller "Advanced Task Killer" it has really made a huge difference on my battery life.

It will eventually cause more problems than it solves. Memory and task management on Android is VERY tricky. Battery life for active users is poor across the board. (Same with iPhones to a certain extent). I always recommend extended batteries and custom ROMs (debloated / AOSP / AOKP) over task killers.